code: def dynamic_import_asr(module, backend):
      """Import ASR models dynamically.
  
      Args:
          module (str): module_name:class_name or alias in `predefined_asr`
          backend (str): NN backend. e.g., pytorch, chainer
  
      Returns:
          type: ASR class
  
      """
      model_class = dynamic_import(
          module, predefined_asr.get(backend, dict())
      )
      assert issubclass(
          model_class, ASRInterface
      ), f"{module} does not implement ASRInterface"
      return model_class
  
file_path: espnet/espnet/nets/asr_interface.py
imports: import argparse
  from espnet.bin.asr_train import get_parser
  from espnet.utils.dynamic_import import dynamic_import
  from espnet.utils.fill_missing_args import fill_missing_args
label_desc: Use image node_id 1 for calling a global function with example usage: dynamic_import_asr(module, backend) and returns: model_class